77876661 has 8 divisors (see below), whose sum is σ = 104363424. Its totient is φ = 51653840.

The previous prime is 77876653. The next prime is 77876693. The reversal of 77876661 is 16667877.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77876661 - 2³ = 77876653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77876661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77876641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65295 + ... + 66476.

It is an arithmetic number, because the mean of its divisors is an integer number (13045428).

Almost surely, 2^77876661 is an apocalyptic number.

It is an amenable number.

77876661 is a deficient number, since it is larger than the sum of its proper divisors (26486763).

77876661 is a wasteful number, since it uses less digits than its factorization.

77876661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131971.

The product of its digits is 592704, while the sum is 48.

The square root of 77876661 is about 8824.7754079070. The cubic root of 77876661 is about 427.0405419040.

The spelling of 77876661 in words is "seventy-seven million, eight hundred seventy-six thousand, six hundred sixty-one".